CN218206833U

CN218206833U - Urea nozzle and vehicle

Info

Publication number: CN218206833U
Application number: CN202222833581.XU
Authority: CN
Inventors: 何彦彬; 李川; 崔建磊; 宋欣
Original assignee: Great Wall Motor Co Ltd
Current assignee: Great Wall Motor Co Ltd
Priority date: 2022-10-26
Filing date: 2022-10-26
Publication date: 2023-01-03
Anticipated expiration: 2032-10-26

Abstract

The utility model provides a urea nozzle and vehicle belongs to vehicle technical field, and the urea nozzle includes: the shell is provided with a urea liquid spray hole; the plunger is movably arranged in the shell to open or close the urea solution spray hole; a sealing part is formed at the end part of the plunger close to the urea solution spray hole, and an occupying part is formed at the end part of the sealing part close to the urea solution spray hole; the sealing part covers the urea solution spray hole, and the occupying part is movably inserted into the urea solution spray hole. When the spraying is stopped, the occupied part is positioned in the urea liquid spraying hole, the physical space of the urea liquid spraying hole is occupied, the urea liquid spraying hole is prevented from being occupied by crystals, further the urea liquid spraying hole is prevented from being blocked by the crystals, the problem that the engine is limited in torque and even the whole vehicle cannot be started is solved, and the occupied part can also play a role in dredging the urea liquid spraying hole; the sealing part can completely cover the urea solution spray hole, so that the sealing effect when the spray is stopped is ensured; the urea liquid orifice is arranged on the shell, and compared with a complex valve seat structure, the urea liquid orifice simplifies the whole structure.

Description

Urea nozzle and vehicle

Technical Field

The utility model belongs to the technical field of the vehicle, concretely relates to urea nozzle and vehicle.

Background

Currently, national VI Diesel vehicles generally require urea injection nozzles to inject urea in front of an SCR (Selective Catalytic Reduction) or SDPF (Diesel particulate Filter with SCR Function).

In general, the urea aqueous solution is quantitatively injected after the exhaust gas treatment, and the emission of nitrogen oxides can be reduced. The urea nozzle is arranged in an exhaust pipe of the diesel vehicle, and the head of the urea nozzle is positioned in the exhaust pipe, so that the urea nozzle needs to bear large temperature difference and high-temperature baking and is corroded by tail gas of an engine. When the engine works badly and the quality of fuel oil or urea is not good, crystallization is easy to occur at the urea nozzle, so that the problem that the urea nozzle is blocked and loses efficacy is easily caused, and further the problem that the engine is limited in torque and even the whole vehicle cannot be started is caused.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a urea nozzle and vehicle aims at solving the urea nozzle and takes place the crystallization condition and lead to the urea nozzle to block up inefficacy, and then leads to the technical problem that the engine limit was turned round even whole car and can't be started.

In order to achieve the above object, the utility model adopts the following technical scheme:

in a first aspect, the present invention provides a urea nozzle, including: the shell is provided with a urea solution spraying hole; the plunger is movably arranged in the shell along the direction far away from or close to the urea solution spray hole so as to open or close the urea solution spray hole; the end part of the plunger close to the urea solution injection hole is provided with a sealing part, and the end part of the sealing part close to the urea solution injection hole is provided with a containing part; the sealing part covers the urea solution spraying hole, and the occupying part is movably inserted into the urea solution spraying hole.

With reference to the first aspect, in some implementations, one end of the housing is recessed inward to form a recessed portion, and the recessed portion is opened with the urea solution nozzle.

With reference to the first aspect, in some implementations, a circumferential profile of the occupational portion is smaller than a profile of a hole wall of the urea solution injection hole, and when the occupational portion is located inside the urea solution injection hole, a preset gap is formed between the occupational portion and the hole wall of the urea solution injection hole.

With reference to the first aspect, in some implementations, in an axial direction of the urea solution injection hole, an extension distance of the occupied portion is greater than an extension distance of the urea solution injection hole, and when the occupied portion is located in the urea solution injection hole, an end of the occupied portion, which is away from the sealing portion, protrudes out of the urea solution injection hole.

With reference to the first aspect, in some implementations, a circumferential profile of the seat portion decreases in an extending direction from the sealing portion to the urea solution injection hole.

In combination with the first aspect, in some implementations, an end of the placeholder remote from the seal is non-pointed.

With reference to the first aspect, in some implementations, a hole wall profile of the urea solution injection hole decreases in an extending direction from the sealing portion to the urea solution injection hole.

With reference to the first aspect, in some implementations, the seat portion and the sealing portion are of a unitary structure.

With reference to the first aspect, in some implementations, the seal is spherical.

In a second aspect, the present invention further provides a vehicle, comprising a urea nozzle as described in any of the above implementations.

The utility model provides a urea nozzle and vehicle have following technological effect at least: compared with the prior art, the utility model provides a urea nozzle and vehicle, the seal structure to the casing of urea nozzle and plunger has optimized, the tip of plunger is formed with sealing part and occupation portion, when stopping spraying, occupation portion is located the urea liquid orifice, occupy the physical space of urea liquid orifice, avoid the crystallization to crowd and occupy the urea liquid orifice, and then prevent that the crystallization from blockking up the urea liquid orifice, reduce the problem that the whole car can't start even of engine limit for torsion, and, in the process of closing or opening the urea liquid orifice, occupation portion can also play the effect of mediation urea liquid orifice; meanwhile, the sealing part can completely cover the urea solution spraying hole, so that the sealing effect when the spraying is stopped is ensured; in addition, the urea liquid orifice is arranged on the shell, and compared with a complex valve seat structure, the urea liquid orifice simplifies the whole structure and improves the sealing performance.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments or the prior art descriptions will be briefly described below, it is obvious that the drawings in the following descriptions are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is an external schematic view of a urea nozzle according to an embodiment of the present invention;

FIG. 2 isbase:Sub>A schematic cross-sectional view A-A of FIG. 1;

FIG. 3 is a partially enlarged schematic view of the structure B shown in FIG. 2;

FIG. 4 is a schematic representation of the configuration of FIG. 3 with the placeholder located within the urea solution injector orifice;

fig. 5 is a schematic view of the structure of fig. 3 with the placeholder outside the urea solution injection orifice.

Description of reference numerals:

1. urea nozzle 100, housing 110, and recessed portion

111. Urea solution injection hole 200, plunger 210, and seal part

220. Occupying part 300, electromagnetic mechanism 400 and return spring

Detailed Description

In order to make the technical problem, technical solution and beneficial effects to be solved by the present invention more clearly understood, the following description is made in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.

It will be understood that when an element is referred to as being "secured to," "connected to," "disposed on," or "secured to" another element, it can be the presence or absence of the intervening element.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs

The meaning is generally understood by a person skilled in the art.

Referring to fig. 1 to 5 together, a urea nozzle 1 and a vehicle according to an embodiment of the present invention will now be described.

Referring to fig. 1 to 5, an embodiment of the invention provides a urea nozzle 1, including: a housing 100 provided with a urea solution injection hole 111; and a plunger 200 movably disposed in the housing 100 in a direction away from or close to the urea solution injection hole 111 to open or close the urea solution injection hole 111; wherein, a sealing part 210 is formed at the end of the plunger 200 close to the urea solution injection hole 111, and a space occupying part 220 is formed at the end of the sealing part 210 close to the urea solution injection hole 111; the sealing portion 210 covers the urea solution nozzle 111, and the occupying portion 220 is movably inserted in the urea solution nozzle 111.

It can be understood that the urea nozzle 1 provided by the embodiment of the present invention further includes conventional components such as the electromagnetic mechanism 300 and the return spring 400, which are not described herein again. The plunger 200 is arranged in the housing 100 and can move in a direction away from or close to the urea solution injection hole 111, and due to the limiting effect of the housing 100, the plunger 200 always moves inside the housing 100, no matter whether the plunger 200 is directly opposite to the urea solution injection hole 111 or is eccentric to the urea solution injection hole 111, when the plunger 200 is away from the urea solution injection hole 111, under the effect of the electromagnetic mechanism 300, the plunger 200 opens the urea solution injection hole 111, and when the plunger 200 is close to the urea solution injection hole 111, under the effect of the return spring 400, the plunger 200 closes the urea solution injection hole 111.

The injection principle of the urea nozzle 1 is as follows: as illustrated in the orientation relationship shown in fig. 1 and fig. 2, after receiving the injection command, the nozzle control unit controls the electromagnetic mechanism 300 to be energized to generate an electromagnetic force, and the plunger 200 is pulled up by the electromagnetic force to open the urea injection passage, so that the urea solution enters the interior of the housing 100 through the inner hole of the plunger 200 and is injected out through the urea solution injection hole 111; when the nozzle control unit receives an injection stopping instruction, the electromagnetic mechanism 300 is controlled to be powered off, the electromagnetic force disappears, and the plunger 200 returns to close the urea injection passage, namely the urea solution injection hole 111, under the action of the return spring 400.

In the traditional urea nozzle, after the spray of the tail liquid and the attached urea solution in the spraying process is stopped, crystallization is easily generated at the spray hole of the urea solution in a severe environment, and the nozzle is easily blocked and stopped after multiple times of accumulation.

And the embodiment of the utility model provides a urea nozzle 1 is formed with sealing 210 and occupy-place portion 220 at the tip of plunger 200, and when stopping spraying, occupy-place portion 220 can occupy the physical space of urea liquid orifice 111, avoids the crystallization accumulation in urea liquid orifice 111, at the in-process of opening and closing urea liquid orifice 111, occupies-place portion 220 can dredge the crystallization of accumulation in urea liquid orifice 111.

The sealing portion 210 can entirely cover the urea solution nozzle 111, when the urea solution nozzle 111 needs to be closed, the occupying portion 220 is located in the urea solution nozzle 111, and the sealing portion 210 covers the urea solution nozzle 111, so that a good sealing effect is achieved.

In addition, the traditional urea nozzle is provided with a complex valve body, a valve seat and other structures, the valve seat is provided with urea solution spray holes, and the urea solution spray holes are opened or closed through the valve.

And the embodiment of the utility model provides a urea nozzle 1 forms urea liquid orifice 111 at a tip of casing 100, need not to set up complicated cooperation structures such as valve body, valve and disk seat, has simplified overall structure, has reduced the preparation installation degree of difficulty, can realize high leakproofness and low cost nature.

The embodiment of the utility model provides a urea nozzle 1 has following technological effect at least: compared with the prior art, the embodiment of the utility model provides a urea nozzle 1, casing 100 to urea nozzle 1 has optimized with plunger 200's seal structure, plunger 200's tip is formed with sealing 210 and occupation portion 220, when stopping spraying, occupation portion 220 is located urea liquid orifice 111, occupy the physical space of urea liquid orifice 111, avoid the crystallization to crowd and occupy urea liquid orifice 111, and then prevent crystallization jam urea liquid orifice 111, reduce the problem that the whole car can't start even of engine limit for torsion, and, in the in-process of closing or opening urea liquid orifice 111, occupation portion 220 can also play the effect of mediation urea liquid orifice 111; meanwhile, the sealing part 210 can completely cover the urea solution injection hole 111, and the sealing effect when the injection is stopped is ensured; in addition, urea solution orifice 111 sets up on casing 100, for loaded down with trivial details valve seat structure, has simplified overall structure, has improved sealing performance.

Specific structures of the housing 100 and the plunger 200 will be described in detail below, but are not limited thereto.

Referring to fig. 2 to 5, in some embodiments, one end of the housing 100 is recessed inward to form a recess 110, and the recess 110 is opened with a urea solution spraying hole 111. Specifically, the end of the housing 100 is recessed towards the inside of the housing 100 to form the recessed portion 110, so as to form a buffer area, on one hand, the reciprocating distance of the plunger 200 can be shortened, and the reciprocating efficiency can be improved, on the other hand, the air flow, the solution flow and the like outside the urea solution injection hole 111 can be prevented from being pressed inwards to the occupied portion 220 as much as possible, the impact force of the air flow, the solution flow and the like can be buffered, the sealing effect of the plunger 200 can be ensured, and the situation of backfiring can be avoided.

Referring to fig. 2 to 5, in some embodiments, a circumferential profile of the occupying part 220 is smaller than a hole wall profile of the urea solution injection hole 111, and when the occupying part 220 is located in the urea solution injection hole 111, a predetermined gap is formed between the occupying part 220 and the hole wall of the urea solution injection hole 111.

It is understood that the urea solution injection holes 111 may have a regular or irregular shape such as a cylinder, a prism, a cone, etc., and correspondingly, the occupying part 220 may also have a regular or irregular shape such as a cylinder, a prism, a cone, etc. In this embodiment, the circumferential profile of the occupying part 220 is set to be smaller than the hole wall profile of the urea solution nozzle hole 111, so that a certain preset gap can be ensured between the occupying part 220 and the urea solution nozzle hole 111, an accidental clamping stagnation condition is prevented, and the normal reciprocating motion of the plunger 200 is ensured.

Meanwhile, although the space 220 and the urea solution injection hole 111 have a predetermined gap therebetween, the sealing portion 210 can completely cover the urea solution injection hole 111, and thus there is no concern about sealability of the urea solution injection hole 111.

Referring to fig. 2 to 4, in some embodiments, in the axial direction of the urea solution injection hole 111, the extending distance of the occupying part 220 is greater than the extending distance of the urea solution injection hole 111, and when the occupying part 220 is located in the urea solution injection hole 111, an end of the occupying part 220 away from the sealing part 210 extends out of the urea solution injection hole 111.

Specifically, the extending distance of the occupying part 220 in the axial direction is greater than the extending distance of the urea solution nozzle 111 in the axial direction, and the overall shapes of the occupying part and the urea solution nozzle are not required, so that when the occupying part 220 is completely located in the urea solution nozzle 111, namely the sealing part 210 abuts against the urea solution nozzle 111, one end of the occupying part 220 extends out of the urea solution nozzle 111, the effect of dredging the outer crystal of the urea solution nozzle 111 can be achieved, the crystal blockage situation can be reduced on the inner side and the outer side of the urea solution nozzle 111, and the dredging effect is further improved.

Referring to fig. 2 to 5, in some embodiments, the circumferential profile of the occupation portion 220 decreases in the extending direction from the sealing portion 210 to the urea solution injection hole 111. In particular, the circumferential profile of the placeholder 220 may be uniformly or gradually decreasing, without limitation. Because the circumferential profile of the occupying part 220 is in a decreasing trend, a conical or similar conical structure can be formed, crystals attached inside and outside the urea solution injection holes 111 can be more easily scraped, and a better dredging effect is achieved.

In combination with the above-described trend of the circumferential profile of the seat 220, as shown in fig. 2 to 5, in some embodiments, the end of the seat 220 away from the sealing portion 210 is not pointed. It will be appreciated that the pointed structures have a small contact area and cannot provide a scraping action over a larger area. Therefore, in the present embodiment, one end of the occupying part 220 is configured to be a non-pointed structure, such as a toothed end surface, a smooth plane, etc., so as to increase the contact area and ensure a larger scraping range.

In combination with the above trend of the circumferential profile of the occupying portion 220, as shown in fig. 2 to 5, in some embodiments, the aperture wall profile of the urea solution injection aperture 111 decreases in the extending direction from the sealing portion 210 to the urea solution injection aperture 111. Specifically, the variation trend of the pore wall profile of the urea solution injection hole 111 may be consistent with or different from the circumferential profile of the occupation part 220, which is not limited as long as there is no physical space interference. Because the pore wall profile of the urea solution nozzle 111 is a reduced area, the occupation part 220 can correspondingly facilitate scraping the crystals attached inside and outside the urea solution nozzle 111, and a better dredging effect is achieved.

Referring to fig. 2-4, in some embodiments, the occupying part 220 and the sealing part 210 are of an integral structure. In this embodiment, occupation portion 220 and sealing portion 210 formula structure as an organic whole can reduce the manufacturing and the installation degree of difficulty to, can guarantee occupation portion 220 and sealing portion 210's structural strength, the difficult fracture condition that appears in the impact improves occupation portion 220 and sealing portion 210's life, improves plunger 200's life promptly.

Of course, in other embodiments, as long as the preset basic structural strength can be ensured, the methods like welding, clamping, screwing and the like can also be adopted, which is not limited.

Referring to fig. 2 and 3, in some embodiments, the sealing portion 210 is spherical. The spherical sealing part 210 has a smooth surface, and when the urea solution flows through the surface of the sealing part 210, the influence of the urea solution on the flow rate of the urea solution can be reduced, so that the urea solution can more smoothly reach the urea solution injection holes 111; when the plunger 200 is returned, the urea solution can be reduced from remaining on the surface of the seal portion 210. Further, the spherical sealing portion 210 has a good sealing effect, and even if the size of the contact portion of the sealing portion 210 is reduced, the sealing portion can still perform a sealing function because it is spherical.

Of course, in other embodiments, the sealing portion 210 may be provided in other shapes, such as a cylindrical shape, a prismatic shape, a conical shape, etc., without limitation, as long as the predetermined basic sealing performance can be ensured.

Based on the same inventive concept, the embodiment of the present invention further provides a vehicle, which includes the urea nozzle 1 as described in any of the above embodiments.

The embodiment of the utility model provides a technical effect of vehicle is the same with above-mentioned urea nozzle 1's technical effect, no longer gives unnecessary details here.

It is to be understood that, the above-mentioned embodiments may be freely combined or deleted to form different combination embodiments, and details of each combination embodiment are not repeated herein, and after this description, it can be considered that the present invention has described each combination embodiment and can support different combination embodiments.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. A urea nozzle, comprising:

a shell (100) provided with a urea solution spray hole (111); and

a plunger (200) movably arranged in the housing (100) along a direction far away from or close to the urea solution injection hole (111) so as to open or close the urea solution injection hole (111);

wherein a sealing part (210) is formed at the end part of the plunger (200) close to the urea solution injection hole (111), and a space occupying part (220) is formed at the end part of the sealing part (210) close to the urea solution injection hole (111);

the sealing part (210) covers the urea solution injection hole (111), and the occupying part (220) is movably inserted into the urea solution injection hole (111).

2. The urea nozzle according to claim 1, wherein one end of the housing (100) is recessed inward to form a recess (110), and the urea solution injection hole (111) is opened in the recess (110).

3. The urea nozzle according to claim 1, wherein a circumferential profile of the seat portion (220) is smaller than a hole wall profile of the urea solution injection hole (111), and when the seat portion (220) is located in the urea solution injection hole (111), a predetermined gap is provided between the seat portion (220) and the hole wall of the urea solution injection hole (111).

4. The urea nozzle according to claim 1, wherein an extension distance of the seat portion (220) is larger than an extension distance of the urea solution injection hole (111) in an axial direction of the urea solution injection hole (111), and when the seat portion (220) is located in the urea solution injection hole (111), an end of the seat portion (220) away from the seal portion (210) protrudes out of the urea solution injection hole (111).

5. The urea nozzle according to claim 1, wherein a circumferential profile of the seat portion (210) decreases in an extending direction from the seal portion (210) to the urea solution injection hole (111).

6. Urea nozzle according to claim 5, characterized in that the end of the land (220) remote from the sealing part (210) is non-pointed.

7. The urea nozzle according to claim 5, wherein a hole wall profile of the urea solution injection hole (111) is reduced in an extending direction from the sealing portion (210) to the urea solution injection hole (111).

8. The urea nozzle of claim 1, wherein the capture portion (220) is of unitary construction with the seal portion (210).

9. The urea nozzle according to claim 1, characterized in that the sealing portion (210) is spherical.

10. A vehicle comprising a urea nozzle according to any one of claims 1-9.